Sennheiser CSTD01

The Sennheiser CSTD01 is a RJ9 lower quick disconnect cord for Sennheiser corded headsets. The CSTD01 allows Sennheiser corded headsets to be used with most Polycom, Aastra, Grandstream and other VoIP phones with a RJ9 headset port. The quick disconnect button allowing the user to easily disconnect the headset from the cable.